DB Hub is a Linux/Unix software designed to be a Direct Connect hub. It's based on Open DC Hub code but has many more enhancements. Documentation is available on http://dbhub.zendor.eu/ (still incomplete, but updated almost every day)

MusicDevil allows you to easy share, store, tag, and stream music. it contains server, which stores files, preferences, and streams audio. It also contains a client app, which can download or upload files, enter tags, and allows you to listen to streams.

The project aims at defining standard for common approach of indexing various types of data in peer-to-peer networks. Among content data following categories can be distinguished: multimedia video, images and audio recordings.

silofish is a free and open source file sharing utility for small networks. It uses its own simple decentralized P2P (peer-to-peer) protocol, which intends to be fast and lightweight. The program has a command-line interface and it works under Linux.